GB2137454A - Handsfree telephone system - Google Patents

Handsfree telephone system Download PDF

Info

Publication number
GB2137454A
GB2137454A GB08305573A GB8305573A GB2137454A GB 2137454 A GB2137454 A GB 2137454A GB 08305573 A GB08305573 A GB 08305573A GB 8305573 A GB8305573 A GB 8305573A GB 2137454 A GB2137454 A GB 2137454A
Authority
GB
United Kingdom
Prior art keywords
handsfree
facility
control
call
lines
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB08305573A
Other languages
English (en)
Other versions
GB8305573D0 (en
GB2137454B (cs
Inventor
Joseph Hood Mcneilly
Bjorn Napier Hansen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Publication of GB2137454B publication Critical patent/GB2137454B/en
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB08305573A priority Critical patent/GB2137454A/en
Publication of GB8305573D0 publication Critical patent/GB8305573D0/en
Priority to AU25055/84A priority patent/AU2505584A/en
Priority to EP84102044A priority patent/EP0120324A3/de
Priority to ES530193A priority patent/ES530193A0/es
Priority to JP3969884A priority patent/JPS59210760A/ja
Priority to BE2/60355A priority patent/BE899041A/fr
Publication of GB2137454A publication Critical patent/GB2137454A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/085—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using digital techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0407—Selecting arrangements for multiplex systems for time-division multiplexing using a stored programme control

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Telephonic Communication Services (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Interface Circuits In Exchanges (AREA)
GB08305573A 1983-03-01 1983-03-01 Handsfree telephone system Withdrawn GB2137454A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB08305573A GB2137454A (en) 1983-03-01 1983-03-01 Handsfree telephone system
AU25055/84A AU2505584A (en) 1983-03-01 1984-02-27 Handsfree telephone system
EP84102044A EP0120324A3 (de) 1983-03-01 1984-02-28 Schaltungsanordnung für eine automatische Fernsprechanlage mit Freisprechbetrieb
ES530193A ES530193A0 (es) 1983-03-01 1984-03-01 Un sistema telefonico automatico con posibilidad de manos libres
JP3969884A JPS59210760A (ja) 1983-03-01 1984-03-01 ハンドフリ−電話システム
BE2/60355A BE899041A (fr) 1983-03-01 1984-03-01 Systeme telephonique a haut-parleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08305573A GB2137454A (en) 1983-03-01 1983-03-01 Handsfree telephone system

Publications (3)

Publication Number Publication Date
GB2137454B GB2137454B (cs)
GB8305573D0 GB8305573D0 (en) 1983-03-30
GB2137454A true GB2137454A (en) 1984-10-03

Family

ID=10538763

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08305573A Withdrawn GB2137454A (en) 1983-03-01 1983-03-01 Handsfree telephone system

Country Status (6)

Country Link
EP (1) EP0120324A3 (cs)
JP (1) JPS59210760A (cs)
AU (1) AU2505584A (cs)
BE (1) BE899041A (cs)
ES (1) ES530193A0 (cs)
GB (1) GB2137454A (cs)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3606516C1 (de) * 1986-02-28 1987-06-19 Telefonbau & Normalzeit Gmbh Schaltungsanordnung fuer Freisprech- und Lauthoereinrichtungen bei Fernsprechapparaten

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO134477C (cs) * 1974-10-29 1976-10-13 Manus Max
JPS549511A (en) * 1977-06-24 1979-01-24 Fujitsu Ltd Digital gain control system using read only memory
US4329543A (en) * 1979-09-06 1982-05-11 Southwest Utilities, Inc. Communication system
JPS5657376A (en) * 1979-10-17 1981-05-19 Fujitsu Ltd Control system for digital transmission loss insertion
JPS5932943B2 (ja) * 1979-10-17 1984-08-11 富士通株式会社 信号制御方式
GB2137049B (en) * 1983-03-15 1986-05-14 Standard Telephones Cables Ltd Handsfree telephone

Also Published As

Publication number Publication date
JPS59210760A (ja) 1984-11-29
GB8305573D0 (en) 1983-03-30
EP0120324A2 (de) 1984-10-03
ES8503906A1 (es) 1985-03-16
EP0120324A3 (de) 1986-12-03
AU2505584A (en) 1984-09-06
BE899041A (fr) 1984-09-03
ES530193A0 (es) 1985-03-16
GB2137454B (cs)

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)